diff --git a/convert/source-ext2.c b/convert/source-ext2.c
index 38c3cd33..c6f9f28e 100644
--- a/convert/source-ext2.c
+++ b/convert/source-ext2.c
@@ -290,7 +290,7 @@ static int ext2_create_file_extents(struct btrfs_trans_handle *trans,
 	char *buffer = NULL;
 	errcode_t err;
 	u32 last_block;
-	u32 sectorsize = root->sectorsize;
+	u32 sectorsize = root->fs_info->sectorsize;
 	u64 inode_size = btrfs_stack_inode_size(btrfs_inode);
 	struct blk_iterate_data data;